Automatic feed and delivery device for platen printing-presses.



K. GILKE. AUTOMATIC FEED AND DELIVERY DEVICE FOR PLATEN PRINTING PRESSES, APPLICATION FILED OCT. 20. um.

L ISQYYU, Patented Apr. 25, 1916.

2 SHEETS-SHEET I- K. GILKE. AUTOMATIC FEED AND DELIVERY DEVICE FOR PLATE N PRINTING PRESSE APPLICATION FILED OCT. 20, I9I3.

Patented Apr. 25,1916.

LIDDHWDI 2 SHEETS-SHEET 2.

KARL GILKE, or coLoenE-sfiLz, GERMANY.

AUTOMATIC FEED AND DELIVERY Specification of Letters Patent.

DEVICE FOR PLATEN l RIN'I.ING-PRESSES.

Patented Apr. 25, 1916.

Application filed October 20, 1913. Serial No. 796,297.

tain new and useful Improvements in Automatic Feed and Delivery Devices fol Platen Printing-Presses, of which the following is a specification.

The subject-matter of my invention is an automatic feed and delivery device for platen printing presses comprising one or more grippers which are mounted on ro-= tatable arms whose axis of rotation is arranged in a novel manner at right angles to the plane of the platen, so that the arms of the grippers which feed and deliver the sheets or work-pieces rotate in one or both directions parallel to the plane of the platen.

As compared with the complicated feed and delivery devices known heretofore which work unreliably when the press runs at a high speed the new feed and delivery device constitutes an improvement in the art owing to its very simple construction and to its working reliably when the press works very quickly. During the printing operation the piece-work is held fast by the gripper. Two or more grippers may be employed which rotate about a common stationary or adjustable axis and in turn continuously bring aboutthe feed and delivery.

One illustrative embodiment of my invention and modifications thereof are diagrammatically represented by way of example in the: accompanying drawing, wherein Figure 1 is a side elevation showing a platen printing press having its platen rocked back out of parallelism at the moment when the opened gripper seizes the sheet of paper. Fig. 2 shows a detail. Fig. 3 is a side elevation showing the press in the printing position while the gripper holds the sheet, Fig. 4 is a plan view of the backwardly rocked platen together with one gripper in the actof seizing and one in the act of delivering a sheet, and Fig. 4 is a detail view of the spreader table (Fig. 1), Fig. 5 is a like view of the platen in its printing position with one feeding and one empty gripper; Fig. 6 is an end elevation, enlarged, showing one gripper, Fig. 7 is a detail view illustrating the manner of adjusting the grippers, Fig. 8 is a top plan view of the platen w1th one feeding gripper.

Fig. 9 is a similar view of the platen with one delivering gripper.

Referring first to Figs. 1 to 5, in this embodiment two grippers 0 and rotate in the direction indicated by the arrow in Fig. 4 about a common pivot 64 carried by (he through an angle of 90 both when 2 platen rocks into and out of parallelism. 5 no grippers 0 and c are normally held closed by springs, not shown, and are opened by stops only when the platen is out of parallelism in order to seize and to release the work-piece. Fig. 4 shows the position of the parts at the moment when the gripper c seizes the sheet of paper which is to be printed and is held ready by hand or by known means, such as suction or friction devices, while the gripper 0 lets the printed sheet fall. When the platen then rocks into parallelism the grippers c and rotate through 90 and are then held exactly in the predetermined position in order to obtain a good register. While the gripper 0 holds the sheet during the printing operation the gripper c is empty above, as indicated in Figs. 3 and 5. When the platen is rocked back the two grippers c and 0 again rotate through 90, whereupon the gripper 0 lets the printed sheet fall and the gripper c seizes a new sheet. The pivot a may be arranged displaceable laterally in order to be able to lay the sheet or the work-piece at any desired part of the platen. Fig. 2 shows how the sheet to be printed is slightly lifted in known manner at its front edge by a suction device, before the gripper 0 seizes it, in order that the'gripper 0 can then seize it. The two grippers may each have a separatepivot and rock forward and backward. Also, instead of the two grippers c and 0 arranged as described above, one gripper can be employed exclusively for feeding, as

indicated in Fig. 8, and the other exclusively for delivering, as indicatedin Fig. 9.

As shown in Fig. 7, the bracket 9 (with the holders 7:. and 71 for the grippers c and 0 are supported b eccentric bolt 71, adjusting screw 70 and the bolt Z. The bolt Z forms the main support. The eccentric bolt '11 allows a fine adjustment ofthe bracket 9 and of the parts connected thereto parallel to the plane of the platen. The screw is, the threaded part of which is screwed into a correspondingly threaded nut of the bracket laten Z) but so, however, that the same g carries at its outer end a sphere head on for a switch crank to be operated by hand. By turning the screw k by means of the crank the lateral displacement of the entire bracket 9 with the grippers into a position corresponding to the size of the paper is effected.

I claim 1. In a platen printing press of the character described, the combination with a platen, of a feed gripper and a delivery gripper carried thereby and rotatable about an adjustable axis at right-angles to the plane of the platen.

Copies of this patent may 2. In a platen printing press of the character described, the combination with a platen, of two grippers, one for feeding and one for delivery exclusively, each rotating about an axis at right-angles to the plane of the platen for bringing about in turn the feed and delivery, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

KARL GILKE. Witnesses IV. HEYER, JOH. MONINGEN.

be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

